JPH0469496B2 - - Google Patents
Info
- Publication number
- JPH0469496B2 JPH0469496B2 JP61296543A JP29654386A JPH0469496B2 JP H0469496 B2 JPH0469496 B2 JP H0469496B2 JP 61296543 A JP61296543 A JP 61296543A JP 29654386 A JP29654386 A JP 29654386A JP H0469496 B2 JPH0469496 B2 JP H0469496B2
- Authority
- JP
- Japan
- Prior art keywords
- hollow material
- tooth profile
- mandrel
- hollow
- helical
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011796 hollow space material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 7
- 238000003825 pressing Methods 0.000 claims description 3
- 239000000463 material Substances 0.000 description 10
- 238000012545 processing Methods 0.000 description 6
- 238000005520 cutting process Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910000760 Hardened steel Inorganic materials 0.000 description 1
- 238000000641 cold extrusion Methods 0.000 description 1
- 238000010273 cold forging Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 244000144985 peep Species 0.000 description 1
- 238000012805 post-processing Methods 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000452 restraining effect Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
- B21K1/00—Making machine elements
- B21K1/28—Making machine elements wheels; discs
- B21K1/30—Making machine elements wheels; discs with gear-teeth
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H5/00—Making gear wheels, racks, spline shafts or worms
- B21H5/02—Making gear wheels, racks, spline shafts or worms with cylindrical outline, e.g. by means of die rolls
- B21H5/025—Internally geared wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D53/00—Making other particular articles
- B21D53/26—Making other particular articles wheels or the like
- B21D53/28—Making other particular articles wheels or the like gear wheels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
- B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
- B21H7/187—Rolling helical or rectilinear grooves
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Forging (AREA)
- Gear Transmission (AREA)
- Gears, Cams (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明はインターナルギヤの製造方法に係り、
特に冷間成形に好適なロール成形によるインター
ナルギヤの製造方法に関する。[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for manufacturing an internal gear,
In particular, the present invention relates to a method of manufacturing an internal gear by roll forming, which is suitable for cold forming.
従来のインターナルギヤの製造方法は、特開昭
57−175043号公報に記載のように冷間鍛造等によ
り加工された中空素材を受型に載置し、その中空
素材の中空部に歯形を備えたポンチを圧入し、前
方押出し加工法によりインターナルギヤを成形し
ていた。
The conventional internal gear manufacturing method is
As described in Publication No. 57-175043, a hollow material processed by cold forging etc. is placed on a receiving mold, a punch with a tooth profile is press-fitted into the hollow part of the hollow material, and an interface is formed by forward extrusion processing. He was molding Nargear.
上記従来技術は冷間成形によりインターナルギ
ヤを成形する点では前進した技術であるが、完全
無切削で行えるようにした点については配慮が不
十分で、冷間加工された中空素材の中空部にポン
チを受入れるいわゆるのぞきとなる段部が必要で
ある。
Although the above conventional technology is an advanced technology in terms of forming internal gears by cold forming, insufficient consideration has been given to making it possible to form internal gears completely without cutting. A so-called peep step is required to receive the punch.
この段部は当然ながら切削加工を行うのが一般
的であるため、加工工数が多くなると共に、材料
歩留りが悪くなり強いては生産コストに大きく影
響する。一方ポンチは先端がつり一で前方押出し
の冷間成形であるためポンチの振れ幅が大きく、
同軸精度の高い製品を得ることは出来ない欠点が
あつた。 As a matter of course, this stepped portion is generally machined by cutting, which increases the number of machining steps, reduces material yield, and has a large impact on production costs. On the other hand, the punch has a hanging tip and is cold-formed with forward extrusion, so the swing range of the punch is large.
The drawback was that it was not possible to obtain products with high coaxial precision.
本発明の目的は、加工工数を少なくして、同軸
精度の高いインターナルギヤの製造方法を提供す
ることにある。 An object of the present invention is to provide a method for manufacturing an internal gear with high coaxial precision while reducing the number of processing steps.
上記目的は、回転する歯形を有するマンドレル
型の中空の中間素材を嵌合配置し、該中間素材を
両側面から押圧保持しつつ、垂直方向からローラ
を押圧し、中空部に歯形を成形して行くことによ
り、達成される。
The above purpose is to fit and arrange a mandrel-shaped hollow intermediate material having a rotating tooth profile, press and hold the intermediate material from both sides, and press a roller from the vertical direction to form a tooth profile in the hollow part. It is achieved by going.
中空素材に垂直に押圧されるローラは序々に中
心方向に向つて変位して行く。それによつて、中
空素材の肉は歯形にそつて塑性変形し、中空部に
次第に歯形を形成して行くと共に、ローラの押圧
周辺に鍔を残しつつ整形されて行くので、無切削
で同軸精度の高いインターナルギヤが成形され
る。
The roller pressed perpendicularly to the hollow material is gradually displaced toward the center. As a result, the flesh of the hollow material is plastically deformed along the tooth profile, gradually forming a tooth profile in the hollow part, and being shaped while leaving a flange around the pressure of the roller, making it possible to achieve coaxial precision without cutting. A tall internal gear is formed.
以下、本発明の一実施例を第１図〜第３図によ
り説明する。
An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.
第１図は自動車用スタータモータのクラツチア
ウターのヘリカルギヤのロール成形工程図で、第
２図に中間素材、第３図に完成品を示す。第２図
に示すクラツチアウターの中空素材１は、通常肌
焼鋼からなるＴ字状の中空素材が用いられ、冷間
押出し成形により大径円筒部１Ａと小径円筒部１
Ｂが形成されている。上記大径円筒部１Ａの内径
部には数個の仕切壁１Ｃを形成することによりロ
ーラ挿入空間１Ｄを形成している。そして、上記
小径円筒部１Ｂには内径面に突出するヘリカルス
プライン（ヘリカル歯形）／Ｅが形成され、外径
面にはスリーブ溝１Ｆを形成するための鍔部１Ｇ
を形成されている。 Fig. 1 is a diagram showing the roll forming process of a helical gear for a clutch outer of an automobile starter motor, Fig. 2 shows an intermediate material, and Fig. 3 shows a finished product. The hollow material 1 of the clutch outer shown in FIG. 2 is usually a T-shaped hollow material made of case hardened steel, and is formed by cold extrusion forming a large diameter cylindrical portion 1A and a small diameter cylindrical portion 1.
B is formed. A roller insertion space 1D is formed by forming several partition walls 1C in the inner diameter portion of the large diameter cylindrical portion 1A. A helical spline (helical tooth profile) /E protruding from the inner diameter surface is formed on the small diameter cylindrical portion 1B, and a flange portion 1G for forming the sleeve groove 1F on the outer diameter surface.
is formed.
次に上記第３図のヘリカルスプライン１Ｅ及び
スリーブ溝１Ｆの成形方法を第１図に基づいて説
明する。 Next, a method of forming the helical spline 1E and sleeve groove 1F shown in FIG. 3 will be explained based on FIG. 1.
図において、クラツチアウターの中空素材であ
る小径円筒部１Ｂは、外周にヘリカルスプライン
（ヘリカル歯形）２Ａを形成したマンドレル型２
の前記ヘリカルスプライン部に挿入配置され、前
記マンドレル型２と一体に回転する主軸３の先端
部３Ａにより一方面が支持され、他面は前記マン
ドル型２の先端２Ｂを受入れる従動軸４の端面４
Ａに押圧支持され、一定間隔を保持している。こ
の状態が加工前工程であり、加工後工程である。 In the figure, the small-diameter cylindrical portion 1B, which is the hollow material of the clutch outer, is a mandrel type 2 with a helical spline (helical tooth profile) 2A formed on the outer periphery.
An end face 4 of a driven shaft 4 is inserted into the helical spline portion of the mandrel mold 2 and is supported on one side by the tip 3A of the main shaft 3 which rotates together with the mandrel die 2, and the other side receives the tip 2B of the mandrel die 2.
It is pressed and supported by A and maintained at a constant distance. This state is a pre-processing process and a post-processing process.
次に中空素材１の小径円筒部１Ｂに、垂直方向
から、支軸５にニードルベアリング６を介して回
転自在に支承された回転ローラ７を押圧させ主軸
を回転させる。すると主軸３と従動軸４によつて
挟持される小径円筒部１Ｂの素材は拘束力のない
ヘリカルスプライン２Ａにそつて塑性流動し、内
径部にヘリカルスプライン１Ｅを形成して行く。
この時押圧される回転ローラ７の外周にそつて、
同時に鍔部１Ｇが型造られて行き、スリーブ溝１
Ｆが確立される。 Next, a rotary roller 7 rotatably supported by a support shaft 5 via a needle bearing 6 is pressed vertically against the small diameter cylindrical portion 1B of the hollow material 1 to rotate the main shaft. Then, the material of the small-diameter cylindrical portion 1B held between the main shaft 3 and the driven shaft 4 plastically flows along the helical spline 2A with no restraining force, forming a helical spline 1E on the inner diameter portion.
Along the outer periphery of the rotating roller 7 that is pressed at this time,
At the same time, the flange 1G is molded, and the sleeve groove 1
F is established.
このようして成形されたクラツチアウターは回
転されながらマンドレル型２から取外され完成品
となる。 The clutch outer molded in this manner is removed from the mandrel mold 2 while being rotated to form a finished product.
上記方法によれば、小径円筒部１Ｂの内径がマ
ンドレル型２によつて保持され、同心円を保つた
ままヘリカルスプライン１Ｅが、冷間ロール成形
により成形されて行くため、同軸精度が確実に確
保され設計上要求される寸法精度が容易に得られ
る。又、冷間ロール成形であるためヘリカル歯形
の精度も高く、仕上げ加工が全く不要となる。そ
の上ローラ押圧部分は、そのままスリーブ溝とし
て利用できるため改めて切削する必要もなく、歩
留りを上げて生産性の高い製品が提供される。 According to the above method, the inner diameter of the small-diameter cylindrical portion 1B is held by the mandrel die 2, and the helical spline 1E is formed by cold roll forming while maintaining the concentric circle, so coaxial accuracy is reliably ensured. Dimensional accuracy required for design can be easily obtained. Furthermore, since it is cold roll formed, the precision of the helical tooth profile is high, and no finishing work is required. Moreover, since the roller pressing portion can be used as it is as a sleeve groove, there is no need to cut it again, increasing the yield and providing a product with high productivity.
第４図はカツプ状の素材１０の大径部内径にヘ
リカルギヤ１０Ａを形成する場合を示す。この種
製品は車軸用オートマテイツク等に広く採用され
る。 FIG. 4 shows a case where a helical gear 10A is formed on the inner diameter of the large diameter portion of the cup-shaped material 10. This type of product is widely used in axle automation, etc.
先ず、従動軸１１によつて支承されるマンドレ
ル型１２の軸先端１２Ａにてカツプ素材（中空素
材）１０の小径円筒部１０Ｂを支持し、整形され
る部分の両側面を前記実施例同様従動軸１１と駆
動軸１３により挟持し、セツトする。 First, the small diameter cylindrical portion 10B of the cup material (hollow material) 10 is supported by the shaft tip 12A of the mandrel mold 12 supported by the driven shaft 11, and both sides of the portion to be shaped are attached to the driven shaft as in the previous embodiment. 11 and the drive shaft 13, and set it.
その状態でカツプ素材１０の外周に垂直にロー
ラ１４を押圧する。すると外径円筒素材はマンド
レル型１２のヘリカルギヤ１２Ａの形状にそつて
塑性変形されて、内径にギヤを有する製品が加工
されて行く。 In this state, the roller 14 is pressed perpendicularly to the outer periphery of the cup material 10. Then, the outer diameter cylindrical material is plastically deformed along the shape of the helical gear 12A of the mandrel mold 12, and a product having a gear on the inner diameter is processed.
この実施例の特徴は同軸精度の高いヘリカルイ
ンナーギヤ製品を無切削で得ることができると共
に、切削加工と違つて、加工歯の逃げを予め作つ
ておく必要がない。従つて、軸方向に短い製品が
容易に得られる利点がある。又、ローラを中空素
材の端部まで広げて加工すれば、内径面全域にわ
たり容易にヘリカルギヤが成形できる。 The feature of this embodiment is that a helical inner gear product with high coaxial precision can be obtained without cutting, and unlike cutting processing, there is no need to create clearances for machined teeth in advance. Therefore, there is an advantage that a product that is short in the axial direction can be easily obtained. Furthermore, by extending the rollers to the ends of the hollow material and processing it, a helical gear can be easily formed over the entire inner diameter surface.
その上ローラ押圧によつて、ヘリカルギヤは加
工硬化され、改めて焼入れ硬化する必要がない。
通常カツプ素材は底付となるので、ブローチ加工
等ができず高度な加工技術を必要としていたが本
実施例によれば未経験者でも極めて容易に加工で
きる。 Furthermore, the helical gear is work-hardened by the roller pressure, so there is no need to quench and harden it again.
Normally, the cup material has a bottom, so it cannot be broached and requires advanced processing techniques, but according to this embodiment, even an inexperienced person can process it extremely easily.
本発明によれば、外径方向からのロール成形に
よる塑性変形により、内側にギヤが成形されるの
で、加工工数を少なくして、同軸精度の高いイン
ターナルギヤが提供できる効果がある。
According to the present invention, since the gear is formed on the inside by plastic deformation by roll forming from the outer diameter direction, it is possible to reduce the number of processing steps and provide an internal gear with high coaxial accuracy.
図面は本発明の実施例を示すもので、第１図は
ロール成形状態を示す要部断面図、第２図はクラ
ツチアウターの中空素材の断面斜視図、第３図は
クラツチアウターの完成断面斜視図、第４図は他
の実施例におけるロール成形状態を示す要部断面
図である。
１……中空素材、２……マンドレル型、２Ａ…
…歯形（ヘリカルスプライン）、３……駆動軸、
４……従動軸。
The drawings show an embodiment of the present invention, in which Fig. 1 is a cross-sectional view of the main part showing the state of roll forming, Fig. 2 is a cross-sectional perspective view of the hollow material of the clutch outer, and Fig. 3 is a completed cross-sectional perspective view of the clutch outer. FIG. 4 is a sectional view of a main part showing a roll forming state in another embodiment. 1...Hollow material, 2...Mandrel type, 2A...
...Tooth profile (helical spline), 3...Drive shaft,
4... Driven shaft.
Claims (1)
素材を嵌入する工程と、 前記中空素材の嵌入部周囲の両側面を押圧保持
する工程と、 前記押圧保持された中空素材をマンドレル型と
共に回転駆動しつつ、外径方向から前記中空素材
に垂直にローラを押圧し、前記マンドレル型の歯
形にそつて中空素材を塑性変形させて中空部素材
の内周に歯形を成形する工程とからなることを特
徴とするインターナルギヤの製造方法。 ２ 特許請求の範囲第１項記載の方法において、
前記歯形成形と同時に中空素材の少なくとも一方
端に鍔を形成することを特徴とするインターナル
ギヤの製造方法。[Scope of Claims] 1. A step of fitting a hollow material into a mandrel mold having a tooth profile formed on the outer periphery, a step of pressing and holding both sides of the periphery of the fitting portion of the hollow material, and a step of holding the pressed and held hollow material. A step of pressing a roller perpendicularly to the hollow material from the outer diameter direction while rotating with the mandrel mold, plastically deforming the hollow material along the tooth profile of the mandrel mold to form a tooth profile on the inner periphery of the hollow material. A method for manufacturing an internal gear, comprising: 2. In the method described in claim 1,
A method for manufacturing an internal gear, characterized in that a flange is formed on at least one end of the hollow material at the same time as the tooth forming shape.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61296543A JPS63149034A (en) | 1986-12-15 | 1986-12-15 | Manufacture of helical internal gear |
| US07/131,087 US4884427A (en) | 1986-12-15 | 1987-12-10 | Method of producing helical internal gear |
| KR1019870014194A KR950008525B1 (en) | 1986-12-15 | 1987-12-11 | Method of producing helical internal gear |
| FR8717318A FR2608078A1 (en) | 1986-12-15 | 1987-12-11 | METHOD FOR MANUFACTURING AN INDOOR HELICOIDAL DENTURE |
| DE3742516A DE3742516C2 (en) | 1986-12-15 | 1987-12-15 | Method for producing a helical internal gear and device for carrying out the method |
| GB8729228A GB2200064B (en) | 1986-12-15 | 1987-12-15 | Method of producing helical internal gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61296543A JPS63149034A (en) | 1986-12-15 | 1986-12-15 | Manufacture of helical internal gear |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63149034A JPS63149034A (en) | 1988-06-21 |
| JPH0469496B2 true JPH0469496B2 (en) | 1992-11-06 |
Family
ID=17834889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61296543A Granted JPS63149034A (en) | 1986-12-15 | 1986-12-15 | Manufacture of helical internal gear |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4884427A (en) |
| JP (1) | JPS63149034A (en) |
| KR (1) | KR950008525B1 (en) |
| DE (1) | DE3742516C2 (en) |
| FR (1) | FR2608078A1 (en) |
| GB (1) | GB2200064B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4014143A1 (en) * | 1990-05-02 | 1991-11-28 | Schneider Gesenkschmiede | CONNECTION BETWEEN A FIRST ROTATIONAL PART AND A SECOND ROTATIONAL PART |
| JP2986251B2 (en) * | 1991-07-24 | 1999-12-06 | 株式会社日立製作所 | Manufacturing method of internal gear, internal gear, reduction mechanism and starter |
| US5689379A (en) * | 1993-12-20 | 1997-11-18 | Asahi Kogaku Kogyo Kabushiki Kaisha | Inner gear, cylindrical product with inner gear, mold for inner gear, mold for cylindrical product with inner gear, method of manufacturing inner gear, and method of manufacturing cylindrical product with inner gear |
| DE59403464D1 (en) * | 1994-06-25 | 1997-09-04 | Grob Ernst Fa | Method and device for rolling hollow parts |
| US5898997A (en) * | 1995-07-03 | 1999-05-04 | General Motors Corporation | Method for manufacturing a wheel bearing spindle |
| JP3192979B2 (en) * | 1996-05-17 | 2001-07-30 | 小島プレス工業株式会社 | Apparatus for molding a metal molded article having a cylindrical portion integrally formed on the outer surface of a base and method for molding such a metal molded article |
| JP3567629B2 (en) * | 1996-07-25 | 2004-09-22 | マツダ株式会社 | Method and apparatus for forming annular body having internal teeth |
| DE19722359A1 (en) * | 1997-05-28 | 1998-12-03 | Dynamit Nobel Ag | Press-rolling device and method for producing ring gears with two internal gears |
| EP1029614A1 (en) * | 1999-02-19 | 2000-08-23 | Leico GmbH & Co. Werkzeugmaschinenbau | Flow-turning device and method for forming a workpiece |
| KR20020071069A (en) * | 2001-03-02 | 2002-09-12 | 민병종 | The Precision hall made of super hardness materials and simultaneous outside diametal processing machine and that method |
| DE10215129A1 (en) * | 2002-04-05 | 2003-10-16 | Elze Waggonbau Gmbh & Co Kg | Base plate, for a cool container, has a vacuum insulation plate at the gooseneck tunnel foamed into the rigid foam insulation, to give an effective insulation without the use of freons |
| KR100692620B1 (en) * | 2005-02-14 | 2007-03-13 | 일진금속공업 주식회사 | Method of producing the pinion gear of an automobile start motor using cold forging process |
| JP2006341287A (en) * | 2005-06-09 | 2006-12-21 | Profiroll Technologies Gmbh | Method for making internal profile with mandrel working on inner surface of cup-like or annular rotation-symmetric workpiece |
| US7425108B2 (en) * | 2006-04-21 | 2008-09-16 | Laszlo Frecska | Method for milling splines |
| US8356506B2 (en) * | 2011-02-25 | 2013-01-22 | Szuba Consulting, Inc. | Method of forming industrial housings |
| DE102012208128B4 (en) | 2012-05-15 | 2021-10-21 | Brose Fahrzeugteile SE & Co. Kommanditgesellschaft, Würzburg | Adjusting device with a drive shaft and method for producing an adjusting device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5540080A (en) * | 1978-09-13 | 1980-03-21 | Yoshiichi Sakamura | Female thread forming method of nuts |
Family Cites Families (21)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3087174A (en) * | 1963-04-30 | Internal thread rolling mandrel | ||
| GB830500A (en) * | 1957-03-01 | 1960-03-16 | Michigan Tool Co | Method and apparatus for forming the internal surface of a tubular workpiece to a predetermined shape |
| US3089161A (en) * | 1960-02-11 | 1963-05-14 | Edwin P Sundholm | Method of forming an internally threaded, gasket-retaining cap |
| GB923995A (en) * | 1961-03-13 | |||
| BE633165A (en) * | 1962-06-05 | |||
| US3263474A (en) * | 1962-12-14 | 1966-08-02 | Ford Motor Co | Method and apparatus for forming splines |
| JPS4026683Y1 (en) * | 1964-07-06 | 1965-09-10 | ||
| US3299680A (en) * | 1965-06-10 | 1967-01-24 | Earl A Thompson | Rolling machine for forming tubular workpieces |
| US3407638A (en) * | 1966-03-24 | 1968-10-29 | Kinefac Corp | Method for forming serrated or corrugated hollow tubes |
| DE7106173U (en) * | 1970-02-19 | 1971-08-26 | Ukaea | WORK EQUIPMENT FOR PROCESSING PIPES |
| JPS473136U (en) * | 1971-01-27 | 1972-09-02 | ||
| AT305734B (en) * | 1971-05-06 | 1973-03-12 | Gfm Gesselschaft Fuer Fertigun | Forging machine for internal profiling of tubular workpieces |
| DE2551156A1 (en) * | 1975-11-14 | 1977-05-26 | Hermanns Gebr Kremo Werke | System for production of circular hollow bodies - with internal grooving etc, has cup of material pressure cold rolled onto preshaped mandrel |
| SU727293A1 (en) * | 1978-07-31 | 1980-04-15 | Челябинский политехнический институт им. Ленинского комсомола | Method of producing thin-walled precision sleeves having internal thread |
| GB2066112A (en) * | 1979-12-28 | 1981-07-08 | Boart Int Ltd | Internal threading of drill string components |
| SE435905B (en) * | 1981-02-03 | 1984-10-29 | Ffv Affersverket | PROCEDURE FOR CALL FORMING OF INTERIOR PROFILES LIKE GENGOR, REFFLOR AND MORE IN PIPES OR SHELTERS |
| SU979001A1 (en) * | 1981-02-11 | 1982-12-07 | Предприятие П/Я А-3681 | Mandrel for expanding ring-like forgings |
| JPS57175043A (en) * | 1981-04-22 | 1982-10-27 | Hitachi Ltd | Inside diameter shape working method of cylindrical parts |
| JPS5973141A (en) * | 1982-10-18 | 1984-04-25 | Toyota Motor Corp | Production of valve body |
| JPS59229234A (en) * | 1983-06-08 | 1984-12-22 | Toyota Motor Corp | Method and apparatus for forming inner peripheral groove of cylindrical body |
| US4543813A (en) * | 1983-09-19 | 1985-10-01 | Trw Cam Gears Limited | Method of making valve sleeves |
-
1986
- 1986-12-15 JP JP61296543A patent/JPS63149034A/en active Granted
-
1987
- 1987-12-10 US US07/131,087 patent/US4884427A/en not_active Expired - Lifetime
- 1987-12-11 FR FR8717318A patent/FR2608078A1/en active Pending
- 1987-12-11 KR KR1019870014194A patent/KR950008525B1/en not_active IP Right Cessation
- 1987-12-15 GB GB8729228A patent/GB2200064B/en not_active Expired - Lifetime
- 1987-12-15 DE DE3742516A patent/DE3742516C2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5540080A (en) * | 1978-09-13 | 1980-03-21 | Yoshiichi Sakamura | Female thread forming method of nuts |
Also Published As
| Publication number | Publication date |
|---|---|
| US4884427A (en) | 1989-12-05 |
| DE3742516A1 (en) | 1988-06-23 |
| GB2200064B (en) | 1991-01-02 |
| JPS63149034A (en) | 1988-06-21 |
| GB2200064A (en) | 1988-07-27 |
| KR950008525B1 (en) | 1995-07-31 |
| DE3742516C2 (en) | 1994-09-22 |
| FR2608078A1 (en) | 1988-06-17 |
| KR880007149A (en) | 1988-08-26 |
| GB8729228D0 (en) | 1988-01-27 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |